| Acronym | Definition |
|---|
| FDU➣Fairleigh Dickinson University |
| FDU➣Fakultet Dramskih Umetnosti (Slovenian: Faculty of Dramatic Arts) |
| FDU➣Flux Detector Unit (avionics) |
| FDU➣Fudan University (Shanghai, China) |
| FDU➣Force Design Update |
| FDU➣Fratelli Dell'Uomo |
| FDU➣Fiber Distribution Unit |
| FDU➣Fleet Diving Unit (Canadian Forces) |
| FDU➣Free Digital Universe (virtual world) |
| FDU➣Bandundu, Zaire (airport code) |
| FDU➣Font Deuglification (software) |
| FDU➣Forest Development Unit (Canada) |
| FDU➣Floppy Drive Unit |
| FDU➣Frequency Doubling Unit |
| FDU➣Fidelity Union Bancorp |
| FDU➣Frequency Determining Unit |
| FDU➣Force Deployment Update |
| FDU➣Fade Down and Up |
| FDU➣Faculty Development Unit (US Army; Ft Sam Houston, TX, USA) |
| FDU➣Flight Duty Uniform |